I believe UEFI support on the 2013 was probably not fully supported then. I wouldn't be surprised if it has to deal with UEFI support. I will be testing it on three different model macs and post my results in the coming days.
I decided to stick the same usb in a mac air model A1466 and WALA! It recognized the usb drive and I was able to boot into it. I created the usb stick using diskmaker X on a older 2013 and tried 4 different methods of creating the bootable usb installer and Zilch! it wouldn't work! BUT. I believe the issue stems from the type of hardware you are utilizing to create the bootable usb stick. So what do you wise people say? Why can't I create a bootable OSX-install-USB like before?Ĭlick to expand.I had the same problem with my MBPro model A1278 not seeing the usb stick when I booted with the alt key option, but switching to a different usb port didn't work for me either. Testing the USB on four different Macs - none of them recognizes the USB as bootable Formatting the USB a thousand times (GUID / OS X - journaled) Tried creating the USB by using Diskmaker X 5.0.1 instead of the terminal command (on three Macs) Tried creating the USB on three different Macs (with Mavericks, Yosemite and El Capitan) Redownloading El Capitan from the App Store (if something was wrong with the first image) Can't really see how I can do this procedure wrong. Is does mount as it should on my desktop, though, and I'm able to run the installer from the USB. However, the install-USB is not bootable and does not show up i the "Startup disk preference panel". As I've done a thousand times before I created an install-USB by downloading El Capitan from the App Store and compiled it on to the USB-drive by using Apples own terminal command. I have decided to go with a fresh and clean install of OS X 10.11 El Capitan this time.
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